It varies from state to state. Some states prohibit passing on the right. Some don't. In Ohio in the late 90's, the law was that anything which you could drive

It varies from state to state. Some states prohibit passing on the right. Some don't. In Ohio in the late 90's, the law was that anything which you could drive on was a lane. I was slowing down in the right lane and signalling a right turn into a parking lot, right when the young lady behind me decided to drive over the empty parking spaces on the right-hand side and pass me. There was a fender-bender. The policeman summarily ruled it was my fault, because according to the law in Ohio, I was responsible for looking out for someone passing me in the "lane" comprised of the empty parking spaces. I think California Law is different, so people can have bike lanes.